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Overloading Unary Operators Using Friend Function
class sign
{
int a,b,c;
public:
sign(){}; sign(int,int,int); void putdata(void);
friend void operator-(sign &);
};
void operator-(sign &s)
{s.a=-s.a;s.b=-s.b;s.c=-s.c; }
void sign::putdata(void)
{cout<<"a is: "<<a<<"\n"; cout<<"b is "<"\n"; cout<<"c is "<<c<<"\n";
}
sign::sign(int x,int y, int z)
{a=x;b=y;c=z; }
int main()
{sign s; //Implicit constructor calling s=sign(1000,2,10); //Explicit constructor calling s.putdata();
-s;
s.putdata();
cout<<endl;
s=sign(-2000,2,-5);
return 0;
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